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<h1><a name="filling"></a>Chapter 29: <a name="i0"></a>Filling</h1>
<p>
You have a grid of squares, some of which contain digits, and the rest of which are empty. Your job is to fill in digits in the empty squares, in such a way that each connected region of squares all containing the same digit has an area equal to that digit.
</p>
<p>
(&#8216;Connected region&#8217;, for the purposes of this game, does not count diagonally separated squares as adjacent.)
</p>
<p>
For example, it follows that no square can contain a zero, and that two adjacent squares can not both contain a one. No region has an area greater than 9 (because then its area would not be a single digit).
</p>
<p>
Credit for this puzzle goes to <a name="i1"></a>Nikoli <a href="#p0">[14]</a>.
</p>
<p>
Filling was contributed to this collection by Jonas K&#246;lker.
</p>
<p><a name="p0"></a>
[14] <a href="http://www.nikoli.co.jp/en/puzzles/fillomino.html"><code>http://www.nikoli.co.jp/en/puzzles/fillomino.html</code></a>
</p>
<h2><a name="filling-controls"></a>29.1 <a name="i2"></a>Filling controls</h2>
<p>
To play Filling, simply click the mouse in any empty square and then type a digit on the keyboard to fill that square. By dragging the mouse, you can select multiple squares to fill with a single keypress. If you make a mistake, click the mouse in the incorrect square and press 0, Space, Backspace or Enter to clear it again (or use the Undo feature).
</p>
<p>
You can also move around the grid with the cursor keys; typing a digit will fill the square containing the cursor with that number; typing 0 will clear it. You can also select multiple squares for numbering or clearing with the return and arrow keys, before typing a digit to fill or clear the highlighted squares (as above). The space bar adds and removes single squares to and from the selection. Escape removes all squares from the selection.
</p>
<p>
(All the actions described in <a href="common.html#common-actions">section 2.1</a> are also available.)
</p>
<h2><a name="filling-parameters"></a>29.2 <a name="i3"></a>Filling parameters</h2>
<p>
Filling allows you to configure the number of rows and columns of the grid, through the &#8216;Type&#8217; menu.
</p>

<hr><address>
[Simon Tatham's Portable Puzzle Collection, version 20151005.11b14a5]</address></body>
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